18 steps · 5 topics · in the order you were taught

One step at a time.

Each step is a short lesson, something to play with, and a round of ten. Score 8 and it ticks off — the blue one is where you're up to.

Start step 1: Fair testsExplore the 3D cell

Topic 1 of 5 · All year

Working scientifically

0/2 done
  1. You are here1Fair testsChange one thing, measure one thing, keep everything else the same.
  2. 2Data and graphsPick the right graph, spot the odd result, and say what the data shows.

Topic 2 of 5 · Term 1

Observing the universe

0/4 done
  1. 3The solar systemEight planets, one star, and distances so big we measure them in light.
  2. 4Day, night and seasonsEarth spins, Earth orbits, and Earth is tilted — three different results.
  3. 5Moon phases and eclipsesHalf the Moon is always lit — the phase is how much of that half we can see.
  4. 6How we knowObservation, then explanation, then better instruments that change the explanation.

Topic 3 of 5 · Term 2

Forces

0/4 done
  1. 7Balanced and unbalanced forcesAdd the arrows. Balanced: no change in motion. Unbalanced: it speeds up, slows down or turns.
  2. 8Mass, weight and frictionMass is stuff, in kilograms. Weight is gravity's pull on it, in newtons.
  3. 9MagnetsLike poles repel, unlike attract — and only iron, nickel, cobalt and steel join in.
  4. 10Simple machinesLess force, more distance. Machines trade one for the other.

Topic 4 of 5 · Term 3

Cells and classification

0/4 done
  1. 11Cells and organellesThe parts inside a cell, what each one does, and which cells have which.
  2. 12MicroscopesMultiply the lenses. Start on low power. Divide the view by the cells.
  3. 13Specialised cellsEach cell is built for its job: the shape tells you the function.
  4. 14Classification and keysGroup by features you can see, name in two parts, sort with yes/no keys.

Topic 5 of 5 · Term 4

Solutions and mixtures

0/4 done
  1. 15The particle modelEverything is particles. Heat them and they move faster and further apart.
  2. 16Solutions and dissolvingSolute + solvent = solution — and the solute never disappears.
  3. 17Separating mixturesEvery technique uses one property: size, boiling point, magnetism or density.
  4. 18Water and densityIce floats, salt water boils hotter, and density decides what sinks.

18 steps. A step is done when you score 8 or more in its round of ten — or get five right in a row.